Finding the Fourth Proportional to 80,969.09, 121,442.56 and 21,808.31

Step by Step Solution

1. Step 1: Write the proportion equation
   80,969.09 : 121,442.56 = 21,808.31 : x
2. Step 2: Convert to fraction form
   80,969.09/121,442.56 = 21,808.31/x
3. Step 3: Cross multiply
   80,969.09x = 121,442.56 × 21,808.31
4. Step 4: Simplify right side
   80,969.09x = 2,648,456,333.94
5. Step 5: Solve for x
   x = 2,648,456,333.94/80,969.09
6. Step 6: Final answer
   x = 32,709.48